Recursos de colección

Repositório Comum (24.607 recursos)

É um repositório para instituições de ensino e investigação produtoras de literatura científica cuja dimensão ainda não justifica a criação de um repositório próprio. Permite integrar instituições, grupos ou indivíduos na infra-estrutura do projecto, nomeadamente através das pesquisas do Portal RCAAP e da B-On.

D-TCA - Artigos em revistas com peer review

Mostrando recursos 1 - 3 de 3

  1. Characterization of Gluten-free Bread Prepared From Maize, Rice and Tapioca Flours using the Hydrocolloid Seaweed Agar-Agar

    Alvarenga, Nuno Bartolomeu; Cebola Lidon, Fernando; Belga, Elisa; Motrena, Patrícia; Guerreiro, Suse; Carvalho, Maria João; Canada, João
    This work aims to check the rheological, physicochemical and sensory characteristics of gluten-free bread produced with corn, rice and tapioca flours, using the hydrocolloid seaweed agar-agar. Relatively to wheat bread, it was found that the pH was slightly lower in gluten-free bread. In the crust only the brightness remained significantly different between both bread types, but in the kernel, the parameters a*,b* and L* diverge significantly. The toughness as well as the force of penetration and cutting were also significantly different between both bread types. The hedonic evaluation showed that the panellists prefered bread with gluten but the quantitative descriptive...
    - 06-jun-2013

  2. Synthesis and spectroscopic characterisation of n-alkyl quaternary ammonium salts typical precursors of cyanines

    Pardal, Ana Cristina; Ramos, S.S.; Santos, P. F.; Reis, L. V.; Almeida, P.
    The synthesis and spectroscopic characterisation of some representative N-alkylsubstituted quaternary ammonium salts derived from benzothiazole, benzoxazole, benzoselenazole, indole and quinoline are described. These heterocyclic salts, bearing an activated methyl group in the 2-position in relation to the nitrogen atom and N-methyl, -pentyl, -hexyl and -decyl chains, are typical precursors of cyanine dyes.
    - 01-jun-2013

  3. Embryo-toxic effects of atrazine environmental concentrations on the crustacean Daphnia magna

    Palma, Patrícia; Barbosa, I.R.
    Atrazine is one of the most used pesticides all over the world and it is frequently detected in surface water. The aim of this study was to evaluate the effects promoted by environmental concentrations of atrazine on the embryo development of Daphnia magna. All the concentrations induced a percentage of embryo abnormalities higher than 78%. The profile of embryo abnormalities included effects in both stages of embryo development (gastrulation and organogenesis). At the lowest concentration (1 µg L-1) we noted the appearance of 20% of arrested eggs. This effect increased with the concentrations, which indicate the increment of the effects...
    - 01-jun-2013

Aviso de cookies: Usamos cookies propias y de terceros para mejorar nuestros servicios, para análisis estadístico y para mostrarle publicidad. Si continua navegando consideramos que acepta su uso en los términos establecidos en la Política de cookies.